Zimbabwean prime minister Morgan Tsvangirai is in Australia. He's calling on the Australian government to lift some sanctions against his country and will meet with trade minister Craig Emerson today to press his case. The EU has just announced that it will lift most of its sanctions if the country holds a credible vote on a new constitution.

The border conflict between the two Sudans appears to be escalating to the point of fully-fledged war. The nations split last July, but have argued over where the border lies and over ownership of resources. Sudan's air force bombed parts of South Sudan overnight, and its president has ruled out any talks with South Sudan after visiting a border town that was occupied by South Sudanese troops two weeks ago.

Eleven thousand years ago, people went from hunting sheep to breeding them. They were one of the first animals to be domesticated and this also had huge implications for the way sheep have developed over the millennia.